Hi! Has someone already packages something depending on CFFI? The verification phase of CFFI expects to be able to write a C file to /usr/lib/python2.7/dist-packages/<module>/__pycache__/. This could be triggered on postinst but maybe there is something better to do, like some way to explain to CFFI that there is nothing to verify since the .so is up-to-date because shipped in a Debian package.